package com.ktjiaoyu.crm.base.shiro;


import com.ktjiaoyu.crm.pojo.Right;
import com.ktjiaoyu.crm.pojo.Role;
import com.ktjiaoyu.crm.pojo.User;
import com.ktjiaoyu.crm.service.RoleService;
import com.ktjiaoyu.crm.service.UserService;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheManager;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;

public class MyShiroRealm extends AuthorizingRealm {
    @Resource
    private UserService userService;
    @Resource
    private RoleService roleService;
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    //redis中的数据的前缀
    private String SHIRO_LOGIN_COUNT="shiro_login_count";//登录次数
    private String SHIRO_IS_LOCK="shiro_is_lock";//锁定用户登录


    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("调用MyShiroRealm.doGetAuthorizationInfo获取权限信息！");
        //获取权限信息
        User user= (User) principalCollection.getPrimaryPrincipal();
        SimpleAuthorizationInfo info=new SimpleAuthorizationInfo();
        //静态授权：授予主体（用户）相应的角色和权限
        /*info.addRole(user.getRole().getRoleName());
        info.addStringPermission("用户列表");//所有用户拥有“用户列表"权限
        if ("管理员".equals(user.getRole().getRoleName())){//管理员拥有增删改权限
            info.addStringPermission("用户添加");
            info.addStringPermission("用户编辑");
            info.addStringPermission("用户删除");
        }*/
        //动态授权
        //Role role = user.getRole();
        Role role=roleService.findRoleByUsers(user);
         if(role!=null){
             info.addRole(user.getRole().getRoleName());
            // Set<Right> rights = role.getRights();
//             int size = rights.size();
//             System.out.println(size);
             List<Right> rights=roleService.findRightsByRole(role);
             try {
                 if (rights != null && rights.size() > 0) {
                     for (Right right : rights) {
                         info.addStringPermission(right.getRightText());
                     }
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
        return info;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        System.out.println("调用MyShiroRealm.doGetAuthenticationInfo获取身份信息！");
        //获取身份信息
        UsernamePasswordToken token= (UsernamePasswordToken) authenticationToken;
        String usrName=token.getUsername();
        //每次访问，登录次数加1
        ValueOperations<String,String> opsForValue=stringRedisTemplate.opsForValue();
        opsForValue.increment(SHIRO_LOGIN_COUNT+usrName,1);
        //计数大于5时，设置用户被锁定一小时，清空登录计数
        if (Integer.parseInt(opsForValue.get(SHIRO_LOGIN_COUNT+usrName))>5){
            opsForValue.set(SHIRO_IS_LOCK+usrName,"LOCK");
            stringRedisTemplate.expire(SHIRO_IS_LOCK+usrName,1, TimeUnit.HOURS);
            stringRedisTemplate.delete(SHIRO_LOGIN_COUNT+usrName);//清空登录计数
        }
        if ("LOCK".equals(opsForValue.get(SHIRO_LOGIN_COUNT+usrName))){
            throw new DisabledAccountException();
        }
        User user=userService.getUserByUsrName(usrName);
        if(user==null){
            throw new UnknownAccountException();//账号错误
        }
        if(user.getUsrFlag()==null||user.getUsrFlag().intValue()==0){
            throw new LockedAccountException();//账号锁定
        }
        SimpleAuthenticationInfo info=new SimpleAuthenticationInfo(
                user,//身份（根据用户名查询数据库获得的用户）
                user.getUsrPassword(),//凭证(查询数据库获得的，密码)
                ByteSource.Util.bytes("czkt"),//加密使用的salt
                super.getName()//Realm对象的名称
        );
        //返回身份信息
        return info;
    }

    //清空当前认证用户权限缓存
    public void clearMyCachedAuthorizationInfo() {
//        clearCachedAuthorizationInfo(SecurityUtils.getSubject().getPrincipals());

        if (this.isAuthenticationCachingEnabled()) {//权限缓存是否可用
            Cache<Object,AuthorizationInfo> cache=null;
            CacheManager cacheManager=this.getCacheManager();
            if (cacheManager!=null){
                String cacheName=this.getAuthenticationCacheName();//获取权限缓存名称
                cache=cacheManager.getCache(cacheName);//获得权限缓存
            }
            if (cache != null) {
                cache.clear(); //清空
            }
        }
    }
}
